Solve: A child slides down a playground slide. If the slide is 3 m high and the child weighs 30 kg, how much potential energy does the child have at the top of the
slide? (Round g to 10 m/s^2)

What type of force holds atoms together in a crystal?

Aheat engine that operates on a carnot cycle has an efficiency of 0.420 when its low-temperature reservoir is at 10 ∘c. part aby how many degrees celsius must you increase the temperature of the high-temperature reservoir to increase the efficiency to 0.600 if you continue to use the same low-temperature reservoir?

Three resistance 4,4 and 6 ohms are joined in the series. the total resistance will be